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What are CVAT Webhooks and how to create and use them

Today we're going to talk about something really cool and useful. It's called  "webhooks". We will show where to find them in CVAT, how to configure them, and the final result of their work.

But before we dive into technical stuff, let’s explain the basics in simple words.

For example, imagine a situation: you're waiting for a friend to come over and play. You could sit by the window and keep looking outside until your friend shows up, right? But wouldn't it be easier if your friend just rang the doorbell when he or she arrived? That way, you could do other fun stuff instead of just waiting.

That's pretty much how webhooks work. They're like the doorbell of the internet.

Now, we're going to talk about a specific tool called CVAT (which stands for Computer Vision Annotation Tool). This tool is used for image annotation and video annotation for further processing of the data in the ML models.

When you're using CVAT, you might be working solo or with a team. In the second case, the team might be working on a lot of different things at the same time. For example, they might teach the computer to recognize different types of dogs or to understand what's happening in a video. 

While they are doing all of this, wouldn't it be nice to know when a specific task is done, or when something changes, without having to keep checking all the time? That's where webhooks come in.

CVAT webhooks are like little messengers. You don't have to keep checking on your annotators by yourself anymore. Instead, these webhooks will let you know when something new happens in CVAT. So, if a task gets started or finished, or if there's a problem or a change, you'll get a message straight away. It's a simple and fluent way to stay updated!

But how does this work? When you're setting up a CVAT webhook, you're basically giving it a special online address (a URL) where it can send its updates. You set the other details, hit the Submit button, and you're good to go! 

Now, whenever something changes in CVAT, your webhook gets to work. It sends a message to the address you provided, telling you all about the event, like what happened and all the specific details.

Curious about how it all works in action? Take a look at this short video that walks you through the whole process:

And that's the basics of CVAT webhooks! They might seem a little complicated at first, but once you understand how they work, they're actually pretty simple and really useful.

So remember, next time you're using CVAT and you want to know how things are going with the tasks, just set up a webhook. It's like setting up a doorbell so you know when your friend has come over. Happy annotating!

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June 6, 2023
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